Is there a public PoC exploit available for CVE-2018-25273?

Yes, a public proof-of-concept exploit is available for CVE-2018-25273. Prioritise patching immediately. EPSS: 0.0%.

Crossfont CVE-2018-25273

Q: What is the CVSS score of CVE-2018-25273?

CVE-2018-25273 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2018-21793 MEDIUM

Classic Buffer Overflow (CWE-120)

2026-04-26 VulnCheck

Buffer Overflow Crossfont

6.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

6.9 MEDIUM

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

PoC Detected

Apr 27, 2026 - 18:55 vuln.today

Public exploit code

CVSS changed

Apr 26, 2026 - 22:22 NVD

6.2 (MEDIUM) 6.9 (MEDIUM)

EUVD ID Assigned

Apr 26, 2026 - 13:30 euvd

EUVD-2018-21793

CVE Published

Apr 26, 2026 - 13:19 nvd

MEDIUM 6.9

DescriptionCVE.org

CrossFont 7.5 contains a buffer overflow vulnerability that allows local attackers to crash the application by submitting an oversized payload in the License Key field. Attackers can generate a malicious file containing 4000 bytes of data, paste it into the License Key input field, and trigger an application crash when processing the input.

AnalysisAI

CrossFont 7.5 contains a buffer overflow vulnerability that allows local attackers to crash the application by submitting an oversized payload in the License Key field. Rated medium severity (CVSS 6.9), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. CrossFont 7.5 contains a buffer overflow vulnerability that allows local attackers to crash the application by submitting an oversized payload in the License Key field. Attackers can generate a malicious file containing 4000 bytes of data, paste it into the License Key input field, and trigger an application crash when processing the input. Affected products include: Acutesystems Crossfont.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.